Daria Kasatkina beat Jil Teichmann 6-2, 6-4 and Liudmila Samsonova overpowered Olympic champion Belinda Bencic 3-6, 6-3, 6-4 to bring Russia its fifth title overall in the team competition previously known as the Fed Cup.
Jannik Sinner, ranked 15th, came good in Cincinnati as he defeated Argentine Federico Delbonis 6-2, 7-5.
Silicon Valley Classic: Danielle Collins beats Daria Kasatkina to pick up second WTA tour title in two weeks
Collins, the 27-year-old who became the tour's 14th first-time champion of 2021 with her claycourt title in Palermo last month, kept the momentum going on the hardcourts of California with a 6-3, 6-7 (10/12), 6-1 victory.
Silicon Valley Classic: Daria Kasatskina knocks out top-seeded Belgian Elise Mertens in straight sets to enter final
Kasatkina, ranked 31st in the world and seeded fourth, notched her third win in four meetings against the 17th-ranked Belgian and gave herself a shot at a third WTA title of 2021 after victories at St. Petersburg and in the Phillip Island Trophy.
Jabeur, the second seed, gained a measure of revenge as she secured her first title at the expense of Kasatkina, one of two women to have beaten her in her previous finals appearances.
Osaka, the reigning US and Australian Open champion, has seven career hard-court titles, but has never managed to lift a clay- court trophy.
A leg injury meant Osaka missed last season's clay-court swing, and her last individual tournament on the surface was at Roland Garros in 2019.
Saint Petersburg Ladies' Trophy: Margarita Gasparyan beats Vera Zvonareva to set up final against Daria Kasatkina
The 36-year-old Zvonareva, a finalist at Wimbledon and the US Open in 2010, is ranked at 38 in the world but she was outplayed by her fellow Russian, who is 10 years her junior and ranked 88 places below her.
The 23-year-old rallied from a set down to win 4-6, 6-2, 6-2 in an event held at Melbourne Park for early losers at the Australian Open.
Australian Open 2021: Djokovic, Serena win; Wawrinka squanders three match points, Andreescu's comeback stalled
Though Tiafoe played an aggressive match, Djokovic was better when it mattered. He had the edge in terms of winners (56-49) and converted five break points to just two for Tiafoe.
Abu Dhabi Open: Sofia Kenin fights back to beat Yulia Putintseva; Maria Sakkari, Elina Svitolina through to quarters
Kenin posted 57 unforced errors to Putintseva's 43 but still prevailed 3-6, 7-6 (5), 6-4 over the 13th-seeded Putintseva.
Kasatkina was the first winner of the new season, beating Wang Qiang 6-2, 3-6, 6-2 after trailing 2-0 in the deciding set. It was the Russian's first match since October, and Wang's first since March.
Wuhan Open 2019: Venus Williams crashes out in first round after defeat to Danielle Collins; Aryna Sabalenka wins
Venus Williams' first visit to Asia since 2017 was cut short as she crashed out of the Wuhan Open first round on Sunday 7-5, 7-6(5) to fellow American Danielle Collins.
Cincinnati Open: Madison Keys tames erroneous forehand to bag long overdue Premier 5 title with win over Svetlana Kuznetsova
Madison Keys didn't magically eliminate the errors. But she did keep it under control long enough for the rest of her game to keep hacking away at the target.
Rogers Cup: Maria Sharapova suffers defeat in first round against Anett Kontaveit; Daria Kasatkina downs Angelique Kerber
Anett Kontaveit spoiled Maria Sharapova's return from injury on Monday, rallying to beat the five-time Grand Slam champion 4-6, 6-3, 6-4 at the WTA tournament in Toronto.
French Open 2019: Marketa Vondrousova’s composed tennis is a breath of fresh air, and a sign of long-term success
For Marketa Vondrousova, her weapon of choice is the ability to surprise. She doesn’t seem all that threatening with her pace of shot off the ground, but then in the middle of a rally she’ll suddenly throw in a perfectly-disguised drop which nobody saw coming.
French Open 2019: In-form Kiki Bertens, Karolina Pliskova lead the charge as women's draw throws up abundance of potential upsets
Here’s a look at what the 2019 French Open women’s singles draw looks like, and how the four quarters might be expected to unfold over the course of the Grand Slam.
Stuttgart Open: Elise Mertens, Jelena Ostapenko suffer first-round exits; Simona Halep, Garbine Muguruza pull out of event
Belgium’s Elise Mertens and Latvia’s Jelena Ostapenko were among Tuesday’s first-round exits at the Porsche Tennis Grand Prix in Stuttgart on a day where other high-profile players withdrew without playing a single match.
Dubai Tennis Championships: Daria Kasatkina downs qualifier Magdalena Frech in first round; Garbine Muguruza advances
Russia’s Daria Kasatkina roared back from a break down in the deciding set to beat Polish qualifier Magdalena Frech 6-3 3-6 6-4 in the opening round of the Dubai Duty Free Tennis Championships on Sunday.
31-year-old Maria Sharapova has been struggling back to elite fitness since watching from the sidelines during her 15-month doping ban that ended in 2017